Mg + 2 HCl → H2 + MgCl2
This is an oxidation-reduction (redox) reaction:
2 HI + 2 e- → 2 H0 (reduction)
Mg0 - 2 e- → MgII (oxidation)
HCl is an oxidizing agent, Mg is a reducing agent.
- HCl – Chlorane , Hydrogen chloride
- Other names: Hydrochloric acid , M , Uriatic acid
- Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]